With A/B testing, you can test two versions of a page at the same URL to see which one performs better with your visitors. When anyone visits your page's URL, half of them will see one version of your page and the other half with see the test variation. You'll see each version of your page performs by comparing engagements in your website analytics such as conversion rate, bounce rate, and click rate.
Marketing Hub Professional and Enterprise accounts can conduct A/B testing on a landing page. CMS Hub Professional and Enterprise accounts can run an A/B test on landing pages and website pages.